feat(package.json): bump version from 0.1.2 to 0.1.3 to reflect new c…

…hanges

feat(package.json): add clean script to remove build files and database.json for a clean start
feat(package.json): add prepublishOnly script to ensure clean build before publishing

examples/zkapps/06-offchain-storage/experimental-zkapp-offchain-storage/package.json

@@ -1,6 +1,6 @@
 {
   "name": "experimental-offchain-zkapp-storage",
-  "version": "0.1.2",
+  "version": "0.1.3",
   "description": "This project is currently under development and should not be used in production.",
   "author": "",
   "license": "Apache-2.0",
@@ -24,7 +24,9 @@
   "scripts": {
     "build": "tsc -p tsconfig.json",
     "generate-key": "node scripts/generate_private_key.js",
-    "server": "npm run build && node --enable-source-maps build/src/server/storageServer.js"
+    "server": "npm run build && node --enable-source-maps build/src/server/storageServer.js",
+    "clean": "rm -rf build && rm -f database.json",
+    "prepublishOnly": "npm run clean && npm run build"
   },
   "lint-staged": {
     "**/*": [